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经营范围
发明名称
KEY TELEPHONE SYSTEM
摘要
申请公布号
JPH01307393(A)
申请公布日期
1989.12.12
申请号
JP19880137523
申请日期
1988.06.06
申请人
NEC CORP
发明人
YABATA RYOICHI
分类号
H04Q3/58
主分类号
H04Q3/58
代理机构
代理人
主权项
地址
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